Thanks for your quick reply. I would like to use Canvas to manage 3 separate courses in 1 shell to better facilitate the flow of content. Module A with 3 groups of assignments. Mod B and Mod C each with 3 groups of assignments. I would like grading to be separate and not cumulative for all modules.

It sounds like "sections" may be what you want to use. In Canvas, a "course" is where the content/assessments/etc. live, and a "section" is where the enrollments are. You can have multiple sections in one course, and set assignments so that they are only required/visible to one section.